Chainstitch sewing machine



A. BELLOW GHAINSTITCH SEWING MACHINE Filed Feb e,

1925 4 Sheets-Sheet 1 Aug. 28, 1923.

A. BELLOW CHAINSTITCH SEWING MACHINE Filed Feb. 6, 1923 4 Sheets-Sheet 2 Aug. 28, 1923.

' A. BELLOW CHAINSTITCH SEWING MACHINE Filled Feb. 6, 1925 4 Sheets-Sheet 5 ufluwnl A. BELLOW CHAINSTITCH' SEWING MACHINE 4 Sheets-Sheet 4 Filed Feb. 6, 1923 Patented Aug. 2%, i223.

stares A E-pp ABRAHAM nnnnow, or Lnnns, nnonnnnf cnnmsrrron' snwrne MAGHINEf Application filed February 7 T 0 aZZ whom it may concern:

Be it known that I, ABRAHAM BELLOW, a subject of the King of Great Britain and Ireland, residing at Leeds, in the county of York, England, have invented new and useful Improvements in or Relating to Chainstitchliiewing Machines (for which I have filed application inGreat Britain December 21, 1921), of which the following is a specification.

This invention relates to chain-stitch sewing machines and more particularly those know as padding, bridling and stay-felling,

machines, of the kind'wherein that portion ofthe goods'through which the st tches are to pass is held at an angle to the body of the goods, to enable the needle, which is of the ordinary straight type, to get a bight therein, said needle being reciprocated transversely across the line of feed in a substa tially horizontal plane to pierce the goods while held at such angle and'entering and emerging on the same face of the fabric, a loop-taking device co-operating with said needle to complete the formation of the titch, and wherein theneedle is adapted to be reciprocated in a stationary guide member forming part of or attached directly to the main frame of the-machine.

According to the present invention the needle travels in a plane substantially parallel to the axis of the main driving shaft and works inconJunction with a forked member, not novel, per se, for drawing out the loop. Thus the needle is adapted to slide to and fro in a suitable guide under the action of a bell-crank lever operated from the main driving shaft by .means of spur wheels suitably connected to one arm of said bell-crank lever, whilst to ensure of the necessary blind stitch being produced, the material is raised by means of a plunger, connected'to and operated by one end of a let *er,'fulcrumed' at or about its centre, its opposite end being connected by a link mem her to an eccentric on the main driving shaft,

to allow the needle to penetrate only to such a depth of the material as is necessary.

In order'that theinvention may be clearly understood and readily carried into effect, the same will now be more fully described with reference to the accompanying sheets of drawings which illustrate my invention, Figurel being a side elevation of the machine, Figure 2 an elevation of the machine from the opposite side thereof to the illuse, 1923. Serial No. 617,289.

meals tration in Figure 1, Figure 3 an elevation from the front; and Figure 4E, aplair' The needle 10 is adapted to be reciproed to engage the-material by means of a t bell-crank lever '11 pivoted at .12 to anarm extending from the body of the machine one end of said lever 11 being suitably connected to the needle bar 14, which is adapted to securely hold the needle 10 by means of the screw 15 engaging theshank thereof, the needle bar 14: being supported in its turn from a further farm 16 of the machine, by a U-shaped guide 17, said guide beingattached'to the arm 16in sucha manner as to be capable of longitudinal?adjustment at will. The otherend of the bell-crank lever 11 is operatedfromthe main driving shaft 18 through the intermediaryof spur wheels 19, 20, and link 21, said link being attached to the end of the .lever 11 by a balljoint 22,.

the other end of the link being attached to 1 a pin 23 on the spur wheel 20, said pin 23 being positioned eccentrically to the centre oft-he wheel as is clearly shown. The looper fork 24, which takes up the'loop formed by the retraction of the needle as is hereinafter I described, isoperated from the main driving shaft 18 by means comprising adisc 25 with a cranked extension 26 which carries a pin 27, said pin supporting the connecting piece 28 in such a manner as to allow 0f the V latter. moving freely around the pin 27. The connecting piece 28 is provided essentially with two adjacent bores or holes at rightangles to each other, one to receive the pin 27 by which it is supported-,cand the other to receive a further pin or the like 29 which supports the forked member 24. Positioned at a suitable point between the fork 2 and the fork 30 is a bearing of the universal type, 32, which is mountedto oscillate on a bracket or pin 33 screwed or otherwise secured to the body portion of the machine, under the action of the mechanism above described, said -bearing32 serving to support theactive end ofthe looper bar 31,.the' arrangement, to whichI make no claim, being of the usualtype now generally fitted to padding machines of this type for drawing out the loop. To facilitate theblind s titch- ,ing of different thicknessesof'material and also to regulate the amount of penetration of the needle into the material, i. e.the' dis tance the stitch is away from the face side of the cloth, aplunger is provided which is automatically operated to move or lift the 39 provided with a handle 40 extending from the collar 41 on the. shank thereof, said; collar being suitably serrated to receive a spring-pa'wl-like 'member 42, the construction-being such that when 'the'handle 4:0 is moved in one direction the plunger 34 is raised afshort distance whilst when moved in the opposite direction it is lowered, the operator knowing; by the number of clicks caused by the pawl 42 taking within the serrations of the collar 41, how' much to move'the handle dO'to obtain a certain result During the stitching of the material therlatter 'is fed or moved forward under the action of a feeder 43 which works in a suitableguide member i l, said guide being supported from a projection or the like 45 of the body portion of the machine. The

feeder 43 is carried b an an ular )resser bar 46, said presser barv being connected to an oscillating link member l? fulcrumed towards the forward end of the machine, which-link member is connected by the bar 4-8 to'the strap of an eccentric 49 .on the driving shaft 18, the arrangement being such that the feeder d3 will move the material forward a predetermined amount into the path of the. needle 10, after which the feeder is raised'to release the material and returns to its forward position when it is lowered to again perform its feeding operation, whilst to. guide the material over the work plate '50, which is formed with a ridge orraised portion at 51 extending approximately "the whole thereof to automatically impart to the material the desired rounded effect. A further eccentric 52 on the main shaft 18 is adapted to operate the lever 53 which slides to and fro about a pin 54 secured to the frame ofthe machine, the forward end of said lever 53 being provided with a suitable foot- 55 for guiding the material, the combined action of foot just described and the feeder l3 tending to feed the material straight without any aid from the operator. The work plate 50 is supportedby a multiplicity of spiral springs 56 'froma box-like member 57 which. is capable of sliding in a vertical plane in the foot-5S,

said box-like member being adjustably se cured thereto by the bolts 59, springs 60 tending to keep it in its raised position,

such position being regulated by the nuts site side of the cloth,

box 57 and its associated parts to release the material as and when required'for removal from the machine.

For allowing of different thicknesses or kinds of material being worked or operated upon, the various parts may be made capable of adjustment as and when required.

in operation theneedle 10 with its thread I is caused to penetrate the cloth, which is positioned between the work plate 50 and the guide member or feed. plate 44, in such a manner that the stitch formed does not show on the face thereof, the needle emerging from the cloth at the forward end of its stroke or travel on the same sideor surface as it originally entered without in any way penetrating or emerging from the oppoduring its reciprocation, and further, the needle 10 is 'moved out on its forward stroke such a distance,

that, upon its being retracted, thethread l projecting from the material at that end of the stitch furthest away from that where the initial penetration took place, forms. a 1

loop, which is taken up by the looper fork 24 as t-he'needle is retracted, said looper' fork drawing out and positioning the loop so as to enable its being correctly taken up by the needle on its next forward movement.

bus the looper fork 2st engagesthe thread with both its prongs in a horizontal plane, which prongs turn into a vertical plane as the looper is performing its sideways move ment across the feed plate 44, during which, movement the needle is retracted from-the material to allow the latter to be f'e d forward the required amount, after which the needle is again moved forward to pass be" tween the crown of the looper prongs and the thread, which is still engaged thereby,

but which is now disengaged by the needle, the latter continuing its forward movement to again penetrate the material, whilst the connected at one end to said needle and at its opposite extremity secured to one of said spur wheels, loop-taking mechanism cooperating-with said needle and operatively connected to said driving shaft, a feeder, an oscillating link connecting said feeder to the drive shaft, a work plate over which said needle works, a box-like member below said plate, springs on said member resiliently supporting said plate, and means projecting from said member for raising or lowering the same. 3

for regulating the amount of penetrationof the needle into the material, a feeder, an oscillating link connecting said feeder to the drive shaft, a work plate over which said needle works, a box-like member below said plate, springs on said member resiliently supporting said plate, and means projecting from said member for raising or lowering the same. a

8. The combination with the body of a chain-stitch sewing machine, of a needle adapted to be reciprocated transversely across said body in a substantially horizontal plane, a drive shaft, spur wheels operatively associated with said shaft, a bell crank connected at one end to said needle and at its opposite extremity secured to one of said spur wheels, loop-taking mechanism co-operating with said needle and operatively connected to said driving'shaft, means for manually regulating the amount of penetration of the needle into the material com rising a plunger, arockingbar connectedto one end of said plunger and its opposite end secured to said drive shaft, manual means connected to said plunger for adjusting the latter, a feeder, an oscillating link connecting said feeder to the drive shaft, a work plate, a boX-like member below said plate, springs on said member resilient ly supporting said plate, and means projectng-from said member for raising or lowering the'same. Y

4:. The combination with the body of a chain-stitch sewing machine, of a needle adapted to be reciprocate-d transversely across said body in a substantially horizontal plane, a drive shaft, spur wheels operatively associated with said shaft, a bell crank connected at one end to said needle and at its opposite extremity secured to one of said spur Wheels, loop-taking mechanism cooperating with said needle and operatively connected to said driving shaft, means for manually regulating the amount of penetration of the needle into the materialcomprising a plunger, a rocking bar connected ;to one end of'said plunger, and its opposite end secured to said drive shaft, manual means connected to said plunger for adjust-' ing'the latter, a feeder, an oscillating link connecting said feeder to the drive shaft, a work plate having a raised portion forautomatically imparting to the material the de sired curve, a box-like member below said plate, springs on said member resiliently supporting said plate, and means projecting from said member for raising or lowering thesame. v i

In testimony whereof I have hereunto set my hand.

ABRAHAM BELLOW. 

